"And then all of a sudden with no warning, charged directly at our officers," said Lt. Zach Perron. "And it was only at that time when the suspect chose to force that confrontation that one of the officers deployed their Taser and the two other officers deployed their firearms."

Police say the man called 911 operators to report a phony crime in order to lure officers to the home that serves as a mental health treatment facility.

#PaloAltoOIS Update: Police say suspect called 9-11 with false emergency to summon officers to home. Charged at them w knife on arrival.